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SMH4046
Preliminary Information
Summit Microelectronics, Inc
2082 1.7 08/23/04
11
AC OPERATING CHARACTERISTICS
Over recommended operating conditions, unless otherwise noted. All voltages are relative to GND. See Figure 5A and 5B Timing
diagrams.
Symbol
Description
Conditions
Min
Typ
Max
Unit
tDOCT = 5.5 µs
tDOCT = 8.5 µs
tDOCT = 11.5 µs
tDOCT = 14.5 µs
tDOCT = 17.5 µs
tDOCT = 20.5 µs
tDOCT = 23.5 µs
tDOCT = 26.5 µs
tDOCT = 29.5 µs
tDOCT = 32.5 µs
tDOCT = 35.5 µs
tDOCT = 38.5 µs
tDOCT = 41.5 µs
tDOCT = 44.5 µs
tDOCT = 47.5 µs
tDOCT
Programmable Over Current Trip
Delay Time
tDOCT = 50.5 µs
-15
tDOCT
+15
%
tDPON = 1 ms
tDPON = 20 ms
tDPON = 40 ms
tDPON
Programmable Power-on delay from
VMX out-of-fault to PUPY active
tDPON = 75 ms
-15
tDPON
+15
%
tDPOFF = 1 ms
tDPOFF = 20 ms
tDPOFF = 40 ms
tDPOFF
Programmable Power-off delay from
VMX off to PUPY inactive
tDPOFF = 75 ms
-15
tDPOFF
+15
%
tPRTO = 1 ms
tPRTO = 40 ms
tPRTO = 150 ms
tPRTO
Programmable Reset Time-Out
Period
tPRTO = 300 ms
-15
tPRTO
+15
%
tSTT = 40 ms
tSTT = 75 ms
tSTT = 150 ms
tSTT
Programmable Sequence
Termination Timer
tSTT = 300 ms
-15
tSTT
+15
%
tADC
10-bit ADC sampling period
Time for ADC conversion
of all 11 channels
2
ms
tDC_CONTROL Active DC Control sampling period
Update period for Active
DC Control of channels
A – C
1.7
ms
Slow Margin, + 10%
change in voltage with
0.1% ripple
TRIM_CAP=1
µF
850
ms
TMARGIN
Margin Time from Nominal
Fast Margin, + 10%
change in voltage with
0.1% ripple
TRIM_CAP=1
µF
85
ms
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